A zener diode and pn junction diode work almost same in reverse-biased conditions. F An n-channel enhanced mode MOSFET has n dropped source and drain. T In an n-channel enhanced mode MOSFET, the drain current flowing into the device is positive when the gate-source voltage is zero T A pn junction diode is reverse-biased when 5V of an external voltage is applied to the p-side of the diode while the n-side is grounded If two pn junction diode are connected in series pointing each other, at least 1.4 V must be applied to turn both diode on